Journal
SOLID STATE IONICS
Volume 177, Issue 5-6, Pages 581-588Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2005.12.028
Keywords
polymer blend electrolyte; ionic conductivity; Raman spectroscopy; rheology; NMR self-diffusion coefficients; SEM
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Polymeric gel electrolytes, based on a blend of poly(methylmethacrylate)/poly(vinylidene fluoride) (PMMA/PVdF), ethylene carbonate/propylene carbonate (EC/PC) as plasticizer and lithium Perchlorate as electrolyte, have been studied as a function of the different polymeric ratios to obtain the best compromise between ionic conduction and mechanical properties of the systems involved. Ionic conductivity and the lithium self-diffusion coefficient were measured by the PFG-NMR method, which revealed a maximum of lithium mobility for the composition PMMA 60%-PVdF 40%. The Raman spectroscopic study revealed a change of the interaction between that of the lithium cations and the plasticizer molecules for different PMMA/PVdF ratios. Oscillatory rheological tests have shown better mechanical properties for the intermediate compositions of the blend. (c) 2006 Elsevier B.V. All rights reserved.
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